ポリクロルビフェニール分散水溶液に対する紫外線照射の影響について(B. 生活科学)

The photodecomposition of polychlorinated biphenyl (PCB) in water was studied. PCB dispered in aqueous solution was decomposed with UV-light irradiation, in specialy with the irradiation of short wavelength region UV-light. Kanechlor-300 (KC-300) dispersed in aqueous solution at a concentration of 50 ppm was decomposed about 70% for 60 min. with the UV-light irradiation by low-pressure mercurry lamp (10W), and dechlorination of its solute was about 23%. The decreasing rate of PCB at the initial stage in irradiation was obeyed to first order reaction for the dependence of time (Fig. 5). The[4,4\u27]chlorinated biphenyl were scarcely photolyzed with UV-light irradiation